const fs = require('fs');
fs.readFile('./1.txt', 'utf8', (err,result1) => {
	console.log(result1);
	fs.readFile('./2.txt','utf8' ,(err,result2) => {
		console.log(result2);
		fs.readFile('./3.txt','utf8',(err, result3)=> {
			console.log(result3);
		})
	})
})